Update editor related npm packages

The npm packages needed updating for 6.4 to the latest.

Props mikachan, mukesdpanchal27, luisherranz, youknowriad, tellthemachines, gziolo, ockham, michalczaplinski

Fixes #59411



git-svn-id: https://develop.svn.wordpress.org/trunk@56710 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-block-parser.php

@@ -73,7 +73,7 @@ class WP_Block_Parser {
 		$this->offset      = 0;
 		$this->output      = array();
 		$this->stack       = array();
-		$this->empty_attrs = json_decode( '{}', true );
+		$this->empty_attrs = array();
 
 		while ( $this->proceed() ) {
 			continue;